This software and related material (data and documentation) are made available by the U.S. Geological Survey (USGS) to be used in the public interest and the advancement of science. You may, without any fee or cost, use, copy, modify, or distribute this software, and any derivative works thereof, and its supporting documentation, subject to the USGS software User's Rights Notice.

You may obtain other electronic or print versions of USGS reports and documentation that are not included with the software distributions.

CAP (Win/Mac/DOS/Sun) Version 2.0 and 1.1, 2017/05/19
Culvert Analysis Program

CFP (WIN) Version 1.8.00, 2011/02/23
A variant of MODFLOW-2005 for simulation of laminar and turbulent flow in pipe networks that exchange water with model cells and or in horizontal preferential flow layers

GNWISQ (Windows) Version 1.1, 2014/09/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Get National Water Information System Streamflow (Q) files

GRIDGEN (WIN) Version 1.00.02, 2017/01/06
Program for generating layered quadtree grids for MODFLOW-USG

Groundwater_Toolbox (WIN) Version 1.3.1, 2017/05/26
A graphical and mapping interface for analysis of hydrologic data. Includes the hydrograph-analysis programs BFI, HYSEP, PART, and RORA (with RECESS).

LIMS for Light Stable Isotopes (Win) Version 8.15.64, 2007/06/16
A Laboratory Information Management System (LIMS) based on Microsoft Access for managing samples, analyses, and other data in a stable isotope (and tritium , carbon-14, and chlorofluorocarbon) laboratory

LOADEST (Linux/Unix/Win)
Homepage for LOADEST software distributed by the U.S. Geological Survey

MEASERR (DOS/DG/Sun) Version 2.5, 1994/04/19
A Program for Determination of Error in Individual Discharge Measurements

MF2K-FMP and MF2005-FMP2 (Win) Version 1.0.00 and 1.0.00, 2009/10/28 and 2006/05/19
Farm Process: Estimate dynamically integrated supply-and-demand components of irrigated agriculture as part of the simulation of surface-water and ground-water flow based on MODFLOW-2000 and MODFLOW-2005

MkDF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make U.S. Environmental Protection Agency DFLOW3 batch-input files

MkPP (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Make Plotting Position

MMA (Sun/DOS) Version 1.210, 2011/09/01
A computer code for analysis of multiple models of the same system using the same observations for calibration

MODEIN (DOS/DG/Sun) Version 1.4, 1998/01/16
Computation of total sediment discharge by the modified Einstein procedure

Model Viewer (Win) Version 1.6, 2012/09/24
Model Viewer is a computer program that displays the results of three-dimensional groundwater models

RRAWFLOW (Win/Unix/Mac) Version 1.16, 2015/04/20
An R Package providing a lumped-parameter model that simulates streamflow, springflow, groundwater level, solute transport, or cave drip for a measurement point in response to a system input of precipitation, recharge, or solute injection

SEAWAT Version 4.00.05, 2012/10/19
A computer program for simulation of three-dimensional variable-density groundwater flow and transport

seawaveQ (Win/Unix/Mac) Version 1.0, 2013/12/30
An R Package Providing a Model and Utilities for Analyzing Trends in Chemical Concentrations in Streams with a Seasonal Wave (seawave) and Adjustment for Streamflow (Q) and Other Ancillary Variables

SREF (Windows) Version 1.0, 2009/12/15
Obtaining and analyzing daily mean streamflow data from the U.S. Geological Survey National Water Information System Web Site: Streamflow Record Extension Facilitator

USGS Library for S-PLUS (Win) Version 4.0, 2011/07/13
A collection of functions, dialogs, and datasets for use in hydrologic applications

Utility_PIEs (Windows) Version 1.10.1.0, 2014/03/06
Utility PIEs: Programs for simplifying the analysis of geographic information in U.S. Geological Survey ground-water models for use within Argus Open Numerical Environments (Argus ONE)

WTAQ (Win) Version 2.1, 2017/04/14
A computer program for calculating drawdowns and estimating hydraulic properties for confined and water-table aquifers

ZONECONC (Win) Version 1.5, 2005/10/25
A postprocessing program that tabulates concentration statistics from concentration data generated by MODFLOW-GWT

Legacy and Superseded software, and software that is not actively supported by the USGS

AIR2D, AIR3D, 1998/04/20
Simulate the movement of air to or from a single borehole screened in the unsaturated zone. Three dimensional air-flow in a heterogeneous, anisotropic unsaturated zone where air flow is induced through dry wells or trenches, as in vapor-extraction remediation

ANALGWST (DG) Version 1.1, 1996/04/03
A set of programs that calculate analytical solutions for one-, two-, and three-dimensional solute transport in ground-water systems with uniform flow

BALNINPT (DOS/DG/Sun) Version 1.9, 1994/11/14
An interactive program for mass-balance calculations (superseded by NETPATH and PHREEQC)

Edit Contours PIE (Win) Version 2.1.0.0
Utility Plug-in for editing contours and importing data from spreadsheets for use within Argus Open Numerical Environments ,Argus ONE (superseded by Utility PIEs)

Edit Data Layer PIE (Win) Version 2.0.0.0, 2001/07/09
Utility Plug-in for editing data in data layers and importing data from spreadsheets for use within Argus Open Numerical Environments, Argus ONE (superseded by Utility PIEs)

MOCDENSE (DOS/DG/SGI/Sun) Version 3.2, purportedly 1995/01
A two-constituent solute transport model for ground water having variable density (most simulation functions of MOCDENSE are now supported by the SEAWAT code)

MODFLOWP (DOS/DG/Sun) Version 3.2, 1997/10/09
Parameter-Estimation Version of the Modular Model (superseded by MODFLOW-2000)